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Subject
- infrared photometry[remove]313
- open star clusters[remove]313
- optical astronomy[remove]313
- photometry313
- wide-band photometry253
- ccd photometry86
- pre-main sequence stars41
- h alpha photometry27
- proper motions27
- radial velocity27
- variable stars21
- x-ray sources21
- line intensities17
- kron-cousins photometry15
- stellar spectral types14
- astronomical object identification11
- effective temperature11
- stellar masses11
- spectroscopy10
- magellanic clouds9